<template>
  <div>
    <div class="search">
      <input v-model="keyword" type="text" placeholder="输入城市名或拼音" class="search-input" />
    </div>
    <div class="search-content" ref="search" v-show="keyword">
        <ul>
            <li class="search-item border-bottom" v-for="item of list" :key="item.id" @click="handleCityClick(item.name)">{{item.name}}</li>
            <li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>.
        </ul>
    </div>
  </div>
</template>
  
  
<script>
import { mapMutations } from "vuex";
import Bscroll from "better-scroll"
export default {
  name: "CitySearch",
  props:{
    cities:Object
  },
  data(){
    return{
        keyword:'',
        list:[],
        timer:null
    }
  },
  methods:{
    handleCityClick(city){
      this.changeCity(city)
      this.$router.push('/')//通过router中的Push方法进行路由跳转
    },
    ...mapMutations(['changeCity'])
  },
  computed:{
    hasNoData(){
        return !this.list.length
    }
  },
  watch:{
    keyword(){
        if(this.timer){
            clearTimeout(this.timer)
        }

        if(!this.keyword){//当输入框中无数据时，将list清空，返回
            this.list = []
            return
        }
        this.timer = setTimeout(()=>{
            const result = []
            for(let i in this.cities){
                this.cities[i].forEach((value)=>{
                    if(value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1){
                        result.push(value)
                    }
                })
            }
            this.list = result
        })
    }
  },
  mounted(){
    this.scroll = new Bscroll(this.$refs.search)
  }
};
</script>
  
  <style lang="stylus" scoped>
  @import '~styles/varibles.styl';

  .search {
    height: 0.72rem;
    padding: 0 0.1rem;
    background-color: $bgColor;

    .search-input {
      box-sizing: border-box;
      height: 0.62rem;
      line-height: 0.62rem;
      width: 100%;
      padding: 0 0.1rem;
      text-align: center;
      border-radius: 0.06rem;
      color: #666;
    }
  }
  .search-content{
    z-index 1
    overflow: hidden
    position:absolute
    top 1.58rem
    left: 0
    right: 0
    bottom: 0
    background: #eee
  }
  .search-item{
    line-height: .62rem
    padding-left: .2rem
    color: #666
    background-color: #fff
  }
</style>